30 day money-back guarantee!No more pounding on the ground hoping the trimmer line will come out. No more fumbling with spools of twisted line. The WEED THRASHER is the best trimming system available today. With its all-steel construction and Monster Cutters™, the WEED THRASHER trimmer head is easy to use and will save you time! The Weed Thrasher Kit includes: Weed Thrasher Head, mounting hardware and 12 cutters, E-Z glide wearing cap, user guide and safety instructions.NOTE: For gas powered trimmers only!